Image lens system and image capturing device

Abstract

An image lens system and an image capturing device are disclosed. The image lens system includes six lenses. The six lenses are sequentially arranged from an object side to an image side of an optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each lens has an object side surface facing the object side and an image side surface facing the image side. The first lens has negative refractive power, and the image side surface of the first lens is concave near an optical axis. The second lens has negative refractive power. At least one surface of at least one lens among the first lens to the sixth lens includes at least one inflection point. When certain conditions are met, aberrations can be corrected.

Description

Technical Field

[0001] This disclosure relates to an image lens system assembly and an image capturing device, and more particularly to an image lens system assembly and an image capturing device that provides a wide field of view configuration. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, allowing pixels to reach smaller sizes. Therefore, optical lenses with high image quality have become indispensable. As technology advances rapidly, the applications of electronic devices equipped with optical lenses are becoming more widespread, leading to more diverse requirements for these lenses. Because traditional optical lenses often struggled to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an image lens system assembly to meet these needs. Summary of the Invention

[0003] The imaging lens system and imaging device disclosed herein, through the configuration of the refractive power and surface shape of the first and second lenses, can increase the viewing angle, form a wide field of view configuration, and facilitate the correction of aberrations.

[0004] This disclosure provides an imaging lens system assembly comprising six lenses, which are sequentially arranged from the object side to the image side of the optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has negative refractive power, and its image-side surface near the optical axis is concave. Preferably, the second lens has negative refractive power. Preferably, the fourth lens has an image-side surface near the optical axis is convex. Preferably, the fifth lens has an object-side surface near the optical axis is convex. Preferably, the sixth lens has negative refractive power. Preferably, at least one of the first to sixth lenses has at least one surface containing at least one inflection point. The imaging lens system assembly comprises a total of six lenses. The focal length of the first lens is f1, the focal length of the second lens is f2, the distance between the first and second lenses on the optical axis is T12, the distance between the second and third lenses on the optical axis is T23, the distance between the third and fourth lenses on the optical axis is T34, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the maximum distance between the optically effective area of ​​the object-side surface of the first lens and the optical axis is Y11, and the maximum image height of the image lens system assembly is ImgH. Preferably, it satisfies the following conditions: 0 < f1 / f2 < 2.0; 1.6 < T12 / (CT1+CT2); 1.1 < T23 / T34 < 5.0; and 1.2 < Y11 / ImgH < 2.0.

[0005] According to the present disclosure, an image capturing apparatus is provided, comprising the image lens system assembly as described in the preceding paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the image lens system assembly.

[0006] According to the present disclosure, an image lens system assembly is provided, comprising six lenses, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in order from the object side to the image side of the optical path. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has negative refractive power, and its image-side surface is concave near the optical axis. Preferably, the second lens has negative refractive power, and its image-side surface is concave near the optical axis. Preferably, the fourth lens has positive refractive power. Preferably, the object-side surface of the sixth lens is concave near the optical axis. Preferably, at least one of the first to sixth lenses has at least one surface comprising at least one inflection point. The total number of lenses in the image lens system assembly is six. The focal length of the first lens is f1, the focal length of the second lens is f2, the separation distance between the first lens and the second lens on the optical axis is T12, the separation distance between the second lens and the third lens on the optical axis is T23, the separation distance between the third lens and the fourth lens on the optical axis is T34, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the aperture value of the image lens system assembly is Fno, the focal length of the fourth lens is f4, and the combined focal length of the fifth lens and the sixth lens is f56. Preferably, the following conditions are satisfied: 0 < f1 / f2 < 2.0; 1.9 < T12 / (CT1+CT2); 0.65 < T23 / T34 < 5.0; 2.0 < (V4+V5) / (V3+V6) < 4.5; 0.30 < f56 / f4 < 2.0; and 1.2 < Fno < 2.0.

[0007] When f1 / f2 satisfies the above conditions, the refractive powers of the first lens and the second lens can cooperate with each other to correct aberrations.

[0008] When T12 / (CT1+CT2) satisfies the above conditions, the first lens and the second lens can cooperate with each other, which facilitates the formation of a wide field-of-view configuration.

[0009] When T23 / T34 satisfies the above conditions, the second lens to the fourth lens can cooperate with each other, which helps to reduce the volume of the image lens system assembly. Brief Description of the Drawings

[0010] Figure 1 A schematic diagram of an image capturing apparatus according to the first embodiment of the present disclosure is depicted;

[0011] Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0012] Figure 3 A schematic diagram illustrating an image-capturing device according to a second embodiment of the present disclosure is shown.

[0013] Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0014] Figure 5 A schematic diagram illustrating an image-capturing device according to a third embodiment of the present disclosure is shown.

[0015] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0016] Figure 7 A schematic diagram illustrating an image-capturing device according to the fourth embodiment of this disclosure is shown;

[0017] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0018] Figure 9 A schematic diagram illustrating an image-capturing device according to the fifth embodiment of this disclosure;

[0019] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0020] Figure 11 A schematic diagram illustrating an image-capturing device according to the sixth embodiment of this disclosure is shown;

[0021] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0022] Figure 13 A schematic diagram showing some parameters and the inflection points of each lens according to the first embodiment is shown;

[0023] Figure 14 A schematic diagram illustrating the application of multiple imaging devices according to the seventh embodiment of this disclosure in a vehicle;

[0024] Figure 15A A schematic diagram illustrating one configuration of the optical path deflection element in an image lens system assembly in accordance with this disclosure;

[0025] Figure 15B A schematic diagram illustrating another configuration of the optical path deflection element in an image lens system according to this disclosure; and

[0026] Figure 15C A schematic diagram illustrating one configuration of the two optical path deflection elements in an image lens system assembly according to the present disclosure is shown.

[0027] [Symbol Explanation]

[0028] 100: Vehicles

[0029] 1,2,3,4,5,6,110,120,130,140,150: Image capturing device

[0030] ST: Aperture

[0031] S1: Aperture

[0032] E1: First lens

[0033] E2: Second lens

[0034] E3: Third Lens

[0035] E4: Fourth Lens

[0036] E5: Fifth Lens

[0037] E6: Sixth Lens

[0038] E7: Filter element

[0039] IMG: Imaging Surface

[0040] IS: Electronic photosensitive element

[0041] IP: Recurve Point

[0042] OA1: First optical axis

[0043] OA2: Second optical axis

[0044] OA3: Third optical axis

[0045] LF, LF1, LF2: Optical path switching elements

[0046] LG: Lens Group

[0047] f: Focal length of the imaging lens system group

[0048] Fno: Aperture value of the imaging lens system group

[0049] HFOV: Half of the maximum field of view in the imaging lens system group.

[0050] N1: Refractive index of the first lens

[0051] N2: Refractive index of the second lens

[0052] N3: Refractive index of the third lens

[0053] N4: Refractive index of the fourth lens

[0054] N5: Refractive index of the fifth lens

[0055] N6: Refractive index of the sixth lens

[0056] Nmax: The maximum refractive index of all lenses in the imaging lens system group.

[0057] Nmin: The minimum refractive index of all lenses in the imaging lens system group.

[0058] V3: Abbe number of the third lens

[0059] V4: Abbe number of the fourth lens

[0060] V5: Abbe number of the fifth lens

[0061] V6: Abbe number of the sixth lens

[0062] CT1: Thickness of the first lens on the optical axis

[0063] CT2: Thickness of the second lens on the optical axis

[0064] CT3: Thickness of the third lens on the optical axis

[0065] CT4: Thickness of the fourth lens on the optical axis

[0066] CT5: Thickness of the fifth lens on the optical axis

[0067] CT6: Thickness of the sixth lens on the optical axis

[0068] ΣCT: The sum of the thicknesses of all lenses in the imaging lens system assembly along the optical axis.

[0069] T12: The distance between the first lens and the second lens on the optical axis

[0070] T23: The distance between the second and third lenses on the optical axis

[0071] T34: The distance between the third and fourth lenses on the optical axis

[0072] T45: The distance between the fourth and fifth lenses on the optical axis

[0073] T56: The distance between the fifth and sixth lenses on the optical axis

[0074] ΣAT: The sum of the distances between two adjacent lenses on the optical axis in an imaging lens system group.

[0075] TL: Distance along the optical axis from the object-side surface of the first lens to the imaging plane.

[0076] EPD: Entrance pupil diameter of the imaging lens system assembly

[0077] ImgH: Maximum image height of the imaging lens system group

[0078] R1: Radius of curvature of the object-side surface of the first lens

[0079] R2: Radius of curvature of the image-side surface of the first lens

[0080] R4: Radius of curvature of the image-side surface of the second lens

[0081] R8: Radius of curvature of the image-side surface of the fourth lens

[0082] R9: Radius of curvature of the object-side surface of the fifth lens

[0083] R10: Radius of curvature of the image-side surface of the fifth lens

[0084] R11: Radius of curvature of the object-side surface of the sixth lens

[0085] f1: Focal length of the first lens

[0086] f2: Focal length of the second lens

[0087] f3: Focal length of the third lens

[0088] f4: Focal length of the fourth lens

[0089] f56: Combined focal length of the fifth and sixth lenses

[0090] Y11: The maximum distance between the optically effective area of ​​the object-side surface of the first lens and the optical axis. Detailed Implementation

[0091] This disclosure provides an imaging lens system assembly comprising six lenses, which are sequentially arranged from the object side to the image side of the optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each lens has an object-side surface facing the object side and an image-side surface facing the image side.

[0092] The first lens has negative refractive power, which helps to increase the viewing angle. The object-side surface of the first lens near the optical axis can be convex, which can adjust the angle of incidence of wide-field rays at the first lens, helping to improve the quality of wide-field images. The image-side surface of the first lens near the optical axis is concave, which can adjust the shape and refractive power of the first lens, helping to form a wide-field configuration.

[0093] The second lens has negative refractive power, which helps to increase the viewing angle. The image-side surface of the second lens near the optical axis can be concave, which can adjust the surface shape of the second lens and help correct aberrations such as astigmatism.

[0094] The fourth lens can have positive refractive power, which can adjust the refractive power distribution of the image lens system assembly and help balance the volume distribution of the image lens system assembly. The near-optical axis of the image-side surface of the fourth lens can be convex, which can adjust the direction of light travel and help adjust the volume distribution at the image-side end of the image lens system assembly.

[0095] The fifth lens can have positive refractive power, which helps to reduce the volume of the image lens system at the image side. The object-side surface of the fifth lens, near the optical axis, can be convex, which can work in conjunction with the fourth lens to improve the quality of wide-field images. The image-side surface of the fifth lens, near the optical axis, can also be convex, which can adjust the direction of light travel and help to increase the imaging area.

[0096] The sixth lens can have negative refractive power, which helps balance the refractive power at the image-side end of the lens system and helps correct aberrations such as spherical aberration. The object-side surface of the sixth lens can be concave near the optical axis, which helps adjust the direction of light incident on the sixth lens and helps reduce surface reflection.

[0097] At least one of the first to sixth lenses has at least one surface containing at least one inflection point. This increases the degree of surface variation of the lens, which helps correct aberrations and reduce lens volume. Additionally, at least two of the first to sixth lenses each have at least one surface that may contain at least one inflection point.

[0098] At least one of the first to sixth lenses may be made of glass, and both its object-side and image-side surfaces may be aspherical. Since glass offers a wider range of material choices, using glass lenses helps improve image quality, and using glass lenses with both object-side and image-side surfaces aspherical can further enhance image quality. Furthermore, at least two, three, four, or five of the first to sixth lenses may be made of glass, and both their object-side and image-side surfaces may be aspherical.

[0099] The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following condition: 0 < f1 / f2 < 2.0. This allows the refractive forces of the first and second lenses to work together to correct aberrations. Additionally, the following condition is satisfied: 0.20 < f1 / f2 < 1.7. Furthermore, the following condition is satisfied: 0.40 < f1 / f2 < 1.5.

[0100] The spacing distance on the optical axis between the first lens and the second lens is T12, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which satisfy the following condition: 1.6 < T12 / (CT1+CT2). Thereby, the first lens and the second lens can cooperate with each other, which facilitates the formation of a wide field-of-view configuration. In addition, the following condition can be satisfied: 1.9 < T12 / (CT1+CT2); or 2.1 < T12 / (CT1+CT2). Furthermore, the following condition can be satisfied: T12 / (CT1+CT2) < 3.2. Thereby, the first lens and the second lens can cooperate with each other, which helps reduce the outer diameter of the object-side end of the image lens system assembly under the wide field-of-view configuration. In addition, the following condition can be satisfied: T12 / (CT1+CT2) < 3.0; or T12 / (CT1+CT2) < 2.8. Furthermore, the following condition can be satisfied: 2.1 < T12 / (CT1+CT2) < 3.0.

[0101] The spacing distance on the optical axis between the second lens and the third lens is T23, and the spacing distance on the optical axis between the third lens and the fourth lens is T34, which satisfy the following condition: 0.65 < T23 / T34; or T23 / T34 < 5.0. Thereby, the second lens to the fourth lens can cooperate with each other, which helps reduce the volume of the image lens system assembly. In addition, the following condition can be satisfied: 0.90 < T23 / T34; or 1.1 < T23 / T34; or 1.3 < T23 / T34. Furthermore, the following condition can be satisfied: T23 / T34 < 4.5; or T23 / T34 < 4.0; or T23 / T34 < 3.5. In addition, the following condition can be satisfied: 0.65 < T23 / T34 < 5.0. Furthermore, the following condition can be satisfied: 1.1 < T23 / T34 < 5.0. In addition, the following condition can be satisfied: 1.3 < T23 / T34 < 4.0.

[0102] The maximum value among the refractive indices of all lenses in the image lens system assembly is Nmax, which satisfies the following condition: 1.80 < Nmax < 2.10. Thereby, the material distribution can be adjusted, which facilitates volume reduction and aberration correction.

[0103] The focal length of the second lens is f2, and the thickness of the second lens on the optical axis is CT2, which satisfy the following condition: -30 < f2 / CT2 < -6.5. Thereby, the surface profile and refractive power of the second lens can be adjusted, which helps strike a balance between increasing the field of view and reducing the volume. In addition, the following condition can be satisfied: -25 < f2 / CT2 < -9.0.

[0104] The distance between the third and fourth lenses on the optical axis is T34. The thickness of the third lens on the optical axis is CT3, and the thickness of the fourth lens on the optical axis is CT4. This satisfies the following condition: 3.0 < (CT3 + CT4) / T34 < 18. This allows the third and fourth lenses to work together, helping to balance the volume distribution at the object-side and image-side ends of the imaging lens system.

[0105] The focal length of the imaging lens system assembly is f, and the focal length of the third lens is f3, which satisfies the following condition: |f / f3| < 0.25. This allows adjustment of the refractive power of the third lens, which helps correct aberrations.

[0106] The distance between the first and second lenses on the optical axis is T12, and the thickness of the first lens on the optical axis is CT1, which satisfies the following condition: 3.6 < T12 / CT1 < 6.0. This allows the first and second lenses to work together, helping to achieve a balance between the viewing angle and the lens outer diameter.

[0107] The maximum distance between the optically effective area of ​​the object-side surface of the first lens and the optical axis is Y11, and the maximum image height of the imaging lens system assembly is ImgH, which satisfies the following condition: 1.2 < Y11 / ImgH < 2.0. This allows for adjustment of the lens outer diameter and the image plane size, helping to achieve a balance between viewing angle, volume distribution, and image plane size.

[0108] The object-side surface of the first lens has a radius of curvature of R1, and the image-side surface has a radius of curvature of R2, satisfying the following condition: 1.0 < R1 / R2 < 10. This allows adjustment of the surface shape of the first lens, which helps increase the viewing angle and correct aberrations.

[0109] The radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9, satisfying the following condition: -1.6 < R8 / R9 < -0.60. This allows the fourth and fifth lenses to work together to improve the quality of wide-field images.

[0110] The distance from the object-side surface of the first lens to the imaging plane along the optical axis is TL, and the entrance pupil diameter of the imaging lens system assembly is EPD, which satisfies the following condition: 11.0 < TL / EPD < 22.0. This achieves a balance between compressing the overall length and increasing the aperture.

[0111] The minimum refractive index of all lenses in the imaging lens system group is Nmin, which satisfies the following condition: 1.60 < Nmin < 1.70. This allows for adjustment of the material distribution, which helps to reduce volume and correct aberrations.

[0112] The sum of the distances between any two adjacent lenses in the imaging lens system assembly along the optical axis is ΣAT, and the sum of the thicknesses of all lenses in the imaging lens system assembly along the optical axis is ΣCT, which satisfies the following condition: 1.1 < ΣCT / ΣAT < 3.0. This allows for adjustment of the lens distribution, which helps to compress the overall length.

[0113] Half of the maximum field of view in the imaging lens system assembly is the upper field of view (HFOV), which satisfies the following condition: 50.0 degrees < HFOV. This allows the imaging lens system assembly to have a wide field of view configuration. Additionally, the following condition must be met: 60.0 degrees < HFOV < 110.0 degrees. This avoids aberrations such as distortion caused by an excessively large field of view.

[0114] The Abbe number of the third lens is V3, the fourth lens is V4, the fifth lens is V5, and the sixth lens is V6, satisfying the following condition: 2.0 < (V4+V5) / (V3+V6) < 4.5. Adjustable lens material distribution helps correct aberrations such as chromatic aberration.

[0115] The fourth lens has a focal length of f4, and the combined focal length of the fifth and sixth lenses is f56, satisfying the following condition: 0.30 < f56 / f4 < 2.0. This allows for adjustment of the refractive power distribution at the image-side end of the lens system, helping to reduce the volume at the image-side end. Additionally, the following condition is also satisfied: 0.37 < f56 / f4 < 1.7.

[0116] The thickness of the first lens along the optical axis is CT1, the thickness of the second lens along the optical axis is CT2, the thickness of the third lens along the optical axis is CT3, the thickness of the fourth lens along the optical axis is CT4, the thickness of the fifth lens along the optical axis is CT5, and the thickness of the sixth lens along the optical axis is CT6, satisfying the following condition: 14.0 < (CT2+CT3+CT4+CT5+CT6) / CT1 <27.0. This allows for adjustment of the lens distribution within the imaging lens system assembly, contributing to volume reduction.

[0117] The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, and the maximum image height of the image lens system assembly is ImgH, which satisfies the following condition: 2.0 < TL / ImgH < 10. This achieves a balance between compressing the total length and increasing the imaging plane. Additionally, the following condition can be satisfied: 4.0 < TL / ImgH < 7.0.

[0118] The aperture value of the imaging lens system group is Fno, which satisfies the following condition: 1.0 < Fno < 2.5. This achieves a balance between illumination and depth of field. Additionally, it satisfies the following condition: 1.2 < Fno < 2.0.

[0119] The distance between the fourth and fifth lenses on the optical axis is T45, and the distance between the fifth and sixth lenses on the optical axis is T56, satisfying the following condition: 1.5 < T45 / T56. This allows the lenses at the image-side of the image lens system to cooperate and correct aberrations. Additionally, the following condition must be satisfied: 3.5 < T45 / T56.

[0120] The radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, satisfying the following condition: 0.80 < R10 / R11 < 1.4. This allows the surface shapes of the fifth and sixth lenses to be matched to correct aberrations.

[0121] The radius of curvature of the image-side surface of the second lens is R4, and the thickness of the second lens along the optical axis is CT2, satisfying the following condition: 4.5 < R4 / CT2 < 25. This allows adjustment of the surface shape of the second lens, which helps to increase the viewing angle and compress the lens outer diameter. Additionally, the following condition can be satisfied: 5.0 < R4 / CT2 < 22.

[0122] The technical features of the imaging lens system group disclosed above can be combined and configured to achieve the corresponding effects.

[0123] The imaging lens system assembly disclosed herein can use lenses made of glass or plastic. Using glass lenses increases the freedom of refractive power configuration within the imaging lens system assembly, and glass lenses can be manufactured using techniques such as grinding or molding. Using plastic lenses effectively reduces production costs. Furthermore, spherical or aspherical (ASP) surfaces can be incorporated into the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of lenses, and effectively reduce the overall length of the imaging lens system assembly disclosed herein. Aspherical surfaces can be manufactured using methods such as plastic injection molding or molding glass lenses.

[0124] In the imaging lens system assembly disclosed herein, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, thereby altering the transmittance of the lens for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600 nm to 800 nm wavelength range to reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0125] In the imaging lens system group provided in this disclosure, if the lens surface is aspherical, it means that the entire or a portion of the optically effective area of ​​the lens surface is aspherical.

[0126] In the imaging lens system group provided in this disclosure, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex near the optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface can be concave near the optical axis. In the imaging lens system group provided in this disclosure, if the lens has positive or negative refractive power, or the focal length of the lens, it can refer to the refractive power or focal length of the lens near the optical axis.

[0127] In the imaging lens system group disclosed herein, the critical point is the point on the lens surface that is tangent to a tangent plane perpendicular to the optical axis, in addition to the point of intersection with the optical axis; the inflection point is the point of intersection where the curvature of the lens surface changes positively or negatively.

[0128] The imaging surface of the image lens system assembly disclosed herein can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, particularly a curved surface with a concave surface facing the object side. Furthermore, in the image lens system assembly disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively arranged between the lens closest to the imaging surface in the imaging optical path and the imaging surface to achieve image correction effects (such as image curvature). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface shape (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface facing the object side near the imaging surface.

[0129] The imaging lens system assembly disclosed herein can also selectively include at least one element with a light-path-deflecting function, such as a prism or mirror, between the subject and the imaging plane in the optical path. This provides greater spatial flexibility in the imaging lens system assembly, allowing the thinner and lighter electronic devices to be made less constrained by the overall optical length of the imaging lens system assembly. For further explanation, please refer to... Figure 15A as well as Figure 15B ,in Figure 15A A schematic diagram illustrating one configuration of the optical path deflection element LF in an image lens system according to this disclosure is provided. Figure 15B A schematic diagram illustrating another configuration of the optical path deflection element LF in an image lens system assembly, according to this disclosure. For example... Figure 15A as well as Figure 15BAs shown, the imaging lens system assembly can travel along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, an optical path deflection element LF, and a second optical axis OA2, wherein the optical path deflection element LF can be as follows: Figure 15A The image shown is positioned between the lens group LG of the subject and the imaging lens system assembly, or as shown in the diagram. Figure 15B The image shows the lens group LG positioned between the imaging lens system assembly and the imaging plane IMG. Please also refer to... Figure 15C The diagram illustrates a configuration of the two optical path deflection elements LF1 and LF2 in an image lens system assembly, according to this disclosure. Figure 15C As shown, the imaging lens system assembly can also extend along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, an optical path reversing element LF1, a second optical axis OA2, an optical path reversing element LF2, and a third optical axis OA3. The optical path reversing element LF1 is positioned between the subject and the lens group LG of the imaging lens system assembly, and the optical path reversing element LF2 is positioned between the lens group LG and the imaging plane IMG. The imaging lens system assembly can also optionally be configured with more than three optical path reversing elements. This disclosure is not limited to the type, number, and position of the optical path reversing elements disclosed in the accompanying drawings.

[0130] In addition, the image lens system assembly provided in this disclosure can be equipped with at least one aperture stop, such as an aperture stop, flare stop, or field stop, as needed, which helps to reduce stray light and improve image quality.

[0131] In the imaging lens system assembly disclosed herein, the aperture configuration can be either a front aperture or a center aperture. A front aperture means the aperture is set between the subject and the first lens, while a center aperture means the aperture is set between the first lens and the imaging plane. If the aperture is a front aperture, it allows for a longer distance between the exit pupil of the imaging lens system assembly and the imaging plane, giving it a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. If the aperture is a center aperture, it helps to expand the field of view of the imaging lens system assembly, giving it the advantages of a wide-angle lens.

[0132] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light control element, capable of electrically or by electrical signals controlling the size and shape of the aperture. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light control element may include masking materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing for adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0133] This disclosure allows for the appropriate placement of one or more optical elements to restrict the form of light passing through the imaging lens system assembly. These optical elements may be filters, polarizers, etc., but are not limited to these components. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but are not limited to these methods. The optical elements may be placed between the object end, image end, or lenses of the imaging lens system assembly to control the passage of specific forms of light, thereby meeting application requirements.

[0134] The imaging lens system group disclosed herein can also be applied in various electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, motion-sensing game consoles, dashcams, reversing cameras, wearable products, and drones.

[0135] This disclosure provides an image capturing device, including an image lens system assembly as described above and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the image lens system assembly. Through the refractive power and surface shape of the first and second lenses, the viewing angle can be increased, forming a wide field of view configuration, and it is beneficial for correcting aberrations. Preferably, the image capturing device may further include a lens barrel, a support device, or a combination thereof.

[0136] <First Embodiment>

[0137] Please refer to Figure 1 as well as Figure 2 ,in Figure 1 A schematic diagram of an image-capturing device 1 according to a first embodiment of the present disclosure is shown. Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1 As can be seen, the image capturing device 1 of the first embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0138] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis; both are aspherical. Additionally, in conjunction with reference... Figure 13 It illustrates a schematic diagram of some parameters and the inflection point IP of each lens according to the first embodiment. Figure 13It can be seen that the object-side surface of the first lens contains two inflection points IP, and the image-side surface of the first lens contains two inflection points IP.

[0139] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis; both are aspherical. Furthermore, the object-side surface of the second lens contains two inflection points IP (marked at...). Figure 13 ).

[0140] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0141] The fourth lens, E4, has positive refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, the object-side surface of the fourth lens contains two inflection points IP (marked at...). Figure 13 ).

[0142] The fifth lens, E5, has positive refractive power and is made of glass. Both its object-side and image-side surfaces are convex near the optical axis, and both are aspherical. Additionally, the image-side surface of the fifth lens includes a curvature point IP (marked at...). Figure 13 ).

[0143] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, the object-side surface of the sixth lens includes a curvature point IP (marked at...). Figure 13 The image-side surface of the sixth lens contains a curvature point IP (marked at...). Figure 13 ).

[0144] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0145] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0146]

[0147] in:

[0148] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0149] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0150] R: Radius of curvature;

[0151] k: cone coefficient; and

[0152] Ai: The i-th order aspherical coefficient.

[0153] In the first embodiment of the image lens system group, the focal length of the image lens system group is f, the aperture value (f-number) of the image lens system group is Fno, and half of the maximum field of view in the image lens system group is HFOV, with the following values: f = 3.41 mm; Fno = 1.65; and HFOV = 69.8 degrees.

[0154] In the imaging lens system group of the first embodiment, the refractive index of the first lens E1 is N1, the refractive index of the second lens E2 is N2, the refractive index of the third lens E3 is N3, the refractive index of the fourth lens E4 is N4, the refractive index of the fifth lens E5 is N5, and the refractive index of the sixth lens E6 is N6. The maximum value of the refractive index of all lenses in the imaging lens system group is Nmax, and the minimum value of the refractive index of all lenses in the imaging lens system group is Nmin, which satisfies the following conditions: Nmax = 2.002; and Nmin = 1.619. In the first embodiment, Nmax is the refractive index N3 of the third lens E3 and the refractive index N6 of the sixth lens E6, and Nmin is the refractive index N4 of the fourth lens E4 and the refractive index N5 of the fifth lens E5.

[0155] In the image lens system group of the first embodiment, the Abbe number of the third lens E3 is V3, the Abbe number of the fourth lens E4 is V4, the Abbe number of the fifth lens E5 is V5, and the Abbe number of the sixth lens E6 is V6, which satisfies the following condition: (V4+V5) / (V3+V6) = 3.30.

[0156] In the imaging lens system group of the first embodiment, the thickness of the first lens E1 on the optical axis is CT1, the thickness of the second lens E2 on the optical axis is CT2, the thickness of the third lens E3 on the optical axis is CT3, the thickness of the fourth lens E4 on the optical axis is CT4, the thickness of the fifth lens E5 on the optical axis is CT5, and the thickness of the sixth lens E6 on the optical axis is CT6, which satisfies the following condition: (CT2+CT3+CT4+CT5+CT6) / CT1 = 18.91.

[0157] In the imaging lens system group of the first embodiment, the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, the thickness of the third lens E3 on the optical axis is CT3, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfies the following condition: (CT3+CT4) / T34 = 10.28.

[0158] In the imaging lens system group of the first embodiment, the distance between the first lens E1 and the second lens E2 on the optical axis is T12, the thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: T12 / (CT1+CT2) = 2.32.

[0159] In the imaging lens system group of the first embodiment, the distance between the first lens E1 and the second lens E2 on the optical axis is T12, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: T12 / CT1 = 4.21.

[0160] In the image lens system group of the first embodiment, the distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, which satisfies the following condition: T23 / T34 = 2.27.

[0161] In the image lens system group of the first embodiment, the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfies the following condition: T45 / T56 = 24.45.

[0162] In the image lens system assembly of the first embodiment, the distance from the object-side surface of the first lens to the imaging plane IMG on the optical axis is TL, and the entrance pupil diameter of the image lens system assembly is EPD, which satisfies the following condition: TL / EPD = 14.50.

[0163] In the first embodiment of the imaging lens system assembly, the distance on the optical axis from the object-side surface of the first lens to the imaging plane IMG is TL, and the maximum image height of the imaging lens system assembly is ImgH (indicated by...). Figure 13 It satisfies the following condition: TL / ImgH = 6.47.

[0164] In the imaging lens system assembly of the first embodiment, the optical axis spacing between the first lens E1 and the second lens E2 is T12, the optical axis spacing between the second lens E2 and the third lens E3 is T23, the optical axis spacing between the third lens E3 and the fourth lens E4 is T34, the optical axis spacing between the fourth lens E4 and the fifth lens E5 is T45, and the optical axis spacing between the fifth lens E5 and the sixth lens E6 is T56. The sum of the optical axis spacing between any two adjacent lenses in the imaging lens system assembly is ΣAT. The optical axis thickness of the first lens E1 is CT1, the optical axis thickness of the second lens E2 is CT2, the optical axis thickness of the third lens E3 is CT3, the optical axis thickness of the fourth lens E4 is CT4, the optical axis thickness of the fifth lens E5 is CT5, and the optical axis thickness of the sixth lens E6 is CT6. The sum of the optical axis thickness of all lenses in the imaging lens system assembly is ΣCT, which satisfies the following condition: ΣCT / ΣAT = 2.05; In the first embodiment, the distance between two adjacent lenses on the optical axis is the distance between two adjacent surfaces of the two adjacent lenses on the optical axis; ΣCT = CT1+CT2+CT3+CT4+CT5+CT6; ΣAT = T12+T23+T34+T45+T56.

[0165] In the imaging lens system assembly of the first embodiment, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfies the following condition: R1 / R2 = 2.18.

[0166] In the image lens system assembly of the first embodiment, the radius of curvature of the image-side surface of the second lens is R4, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: R4 / CT2 = 11.34.

[0167] In the image lens system assembly of the first embodiment, the radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9, which satisfies the following condition: R8 / R9 = -0.87.

[0168] In the image lens system assembly of the first embodiment, the radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, which satisfies the following condition: R10 / R11 = 0.92.

[0169] In the first embodiment of the image lens system group, the focal length of the image lens system group is f, and the focal length of the third lens E3 is f3, which satisfies the following condition: |f / f3| = 0.20.

[0170] In the imaging lens system group of the first embodiment, the focal length of the first lens E1 is f1 and the focal length of the second lens E2 is f2, which satisfies the following condition: f1 / f2 = 0.96.

[0171] In the imaging lens system assembly of the first embodiment, the focal length of the second lens E2 is f2, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: f2 / CT2 = -12.95.

[0172] In the image lens system group of the first embodiment, the focal length of the fourth lens E4 is f4, and the combined focal length of the fifth lens E5 and the sixth lens E6 is f56, which satisfies the following condition: f56 / f4 = 0.83.

[0173] In the imaging lens system assembly of the first embodiment, the maximum distance between the optically effective area of ​​the object-side surface of the first lens and the optical axis is Y11 (indicated by...). Figure 13 The maximum image height of the image lens system group is ImgH, which satisfies the following condition: Y11 / ImgH = 1.44.

[0174] Please also refer to Table 1A and Table 1B below.

[0175]

[0176]

[0177] Table 1A is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are mm, and surfaces 0-17 sequentially represent surfaces from the object side to the image side. Table 1B shows the aspherical data in the first embodiment, where k represents the cone coefficient in the aspherical curve equation, and A4-A12 represent the 4th-12th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1A and 1B of the first embodiment, and will not be repeated here.

[0178] <Second Embodiment>

[0179] Please refer to Figure 3 as well as Figure 4 ,in Figure 3 A schematic diagram of an image-capturing device 2 according to a second embodiment of the present disclosure is shown. Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3As can be seen, the image capturing device 2 of the second embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0180] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0181] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis, both of which are aspherical. In addition, the object-side surface of the second lens contains a point of inflection.

[0182] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. In addition, the image-side surface of the third lens contains a point of inflection.

[0183] The fourth lens, E4, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. In addition, the image-side surface of the fourth lens contains a point of inflection.

[0184] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. Additionally, the object-side surface of the fifth lens contains a point of inflection.

[0185] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, the image-side surface of the sixth lens contains a point of inflection. Furthermore, the image-side surface of the fifth lens and the object-side surface of the sixth lens are bonded together to form an adhesive lens.

[0186] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0187] Please also refer to Table 2A and Table 2B below.

[0188]

[0189]

[0190] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in Table 2C below are the same as in the first embodiment, and will not be repeated here.

[0191] By referring to Tables 2A and 2B, the following data can be calculated:

[0192]

[0193] <Third Embodiment>

[0194] Please refer to Figure 5 as well as Figure 6 ,in Figure 5 A schematic diagram of an image-capturing device 3 according to a third embodiment of the present disclosure is shown. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5 As can be seen, the imaging device 3 of the third embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0195] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0196] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis, both of which are aspherical. In addition, the object-side surface of the second lens contains two inflection points.

[0197] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is flat near the optical axis; both are aspherical. In addition, the object-side surface of the third lens contains a point of inflection.

[0198] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis, both of which are aspherical. In addition, the object-side surface of the fourth lens contains a point of inflection, and the image-side surface of the fourth lens contains a point of inflection.

[0199] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both of these surfaces are aspherical.

[0200] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, the image-side surface of the sixth lens contains a point of inflection. Furthermore, the image-side surface of the fifth lens and the object-side surface of the sixth lens are bonded together to form an adhesive lens.

[0201] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0202] Please also refer to Table 3A and Table 3B below.

[0203]

[0204]

[0205] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the 3C parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0206] By referring to Tables 3A and 3B, the following data can be calculated:

[0207]

[0208] <Fourth Embodiment>

[0209] Please refer to Figure 7 as well as Figure 8 ,in Figure 7 A schematic diagram of an image-capturing device 4 according to the fourth embodiment of this disclosure is shown. Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 As can be seen, the image capturing device 4 of the fourth embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0210] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0211] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis; both are aspherical. In addition, the object-side surface of the second lens contains two inflection points.

[0212] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis; both are aspherical. In addition, the object-side surface of the third lens contains two inflection points.

[0213] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both are aspherical.

[0214] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. In addition, the image-side surface of the fifth lens contains a point of inflection.

[0215] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, both the object-side and image-side surfaces of the sixth lens contain a point of inflection.

[0216] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0217] Please also refer to Table 4A and Table 4B below.

[0218]

[0219]

[0220] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the 4C parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0221] By referring to Tables 4A and 4B, the following data can be calculated:

[0222]

[0223] <Fifth Embodiment>

[0224] Please refer to Figure 9 as well as Figure 10 ,in Figure 9A schematic diagram of an image-capturing device 5 according to the fifth embodiment of this disclosure is shown. Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 9 As can be seen, the image capturing device 5 of the fifth embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0225] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0226] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis, both of which are aspherical. In addition, the object-side surface of the second lens contains a point of inflection.

[0227] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0228] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is flat near the optical axis, and its image-side surface is convex near the optical axis. Both are aspherical.

[0229] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. In addition, the image-side surface of the fifth lens contains a point of inflection.

[0230] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis; both are aspherical. In addition, the object-side surface of the sixth lens contains a point of inflection.

[0231] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0232] Please also refer to Table 5A and Table 5B below.

[0233]

[0234]

[0235] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the 5C parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0236] By referring to Tables 5A and 5B, the following data can be calculated:

[0237]

[0238] <Sixth Embodiment>

[0239] Please refer to Figure 11 as well as Figure 12 ,in Figure 11 A schematic diagram of an image-capturing device 6 according to the sixth embodiment of this disclosure is shown. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 As can be seen, the imaging device 6 of the sixth embodiment includes an image lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image lens system assembly includes, in sequence from the object side to the image side of the optical path, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the image lens system assembly. The image lens system assembly includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the six lenses.

[0240] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0241] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis, both of which are aspherical. In addition, the object-side surface of the second lens contains a point of inflection.

[0242] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical.

[0243] The fourth lens, E4, has positive refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. In addition, the object-side surface of the fourth lens contains a point of inflection.

[0244] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis; both are aspherical. Additionally, both the object-side and image-side surfaces of the fifth lens contain a point of inflection.

[0245] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis; both are aspherical. Additionally, both the object-side and image-side surfaces of the sixth lens contain a point of inflection.

[0246] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the image lens system group.

[0247] Please also refer to Table 6A and Table 6B below.

[0248]

[0249]

[0250] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the 6C parameters in Table 6 below are the same as in the first embodiment and will not be repeated here.

[0251] By referring to Tables 6A and 6B, the following data can be calculated:

[0252]

[0253] <Seventh Embodiment>

[0254] Please refer to Figure 14 This is a schematic diagram illustrating the application of multiple imaging devices 110, 120, 130, 140, and 150 according to the seventh embodiment of this disclosure to a vehicle 100. Figure 14 As can be seen, the vehicle 100 is equipped with multiple image capturing devices 110, 120, 130, 140, and 150 as disclosed herein. Each of these image capturing devices 110, 120, 130, 140, and 150 is a wide-angle image capturing device, comprising an image lens system group (not shown) and an electronic photosensitive element (not shown). The electronic photosensitive element is disposed on an imaging surface of the image lens system group. Specifically, the image capturing devices 110, 120, 130, 140, and 150 can be any of the image capturing devices 1, 2, 3, 4, 5, and 6 disclosed in the first to sixth embodiments, but this disclosure is not limited thereto.

[0255] Specifically, image capturing device 110 is positioned at the front of vehicle 100, image capturing devices 120 and 130 are positioned on the left and right sides of vehicle 100 respectively, image capturing device 140 is positioned inside vehicle 100 and faces the front, and image capturing device 150 is positioned at the rear of vehicle 100. This allows for the detection of the vehicle's surrounding environment, serving as a reference for functions such as assisted driving or autonomous driving. It must be noted that... Figure 14 The configuration of the image-capturing devices 110, 120, 130, 140, and 150 in the seventh embodiment is merely an example; in practice, the number, position, and orientation can be adjusted according to usage requirements. Furthermore, the image-capturing devices disclosed herein can be applied to other devices, and are not limited to the vehicle 100 disclosed in the seventh embodiment.

[0256] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. An image lens system assembly, characterized in that, It contains six lenses, which are arranged in the following order from the object side to the image side of the optical path: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; The first lens has negative refractive power, and its image-side surface is concave near the optical axis. The second lens has negative refractive power; The image-side surface of the fourth lens is convex near the optical axis. The object-side surface of the fifth lens is convex near the optical axis; and The sixth lens has negative refractive power; Wherein, at least one of the first to sixth lenses has at least one surface containing at least one inflection point; The imaging lens system comprises six lenses in total. The focal length of the first lens is f1, the focal length of the second lens is f2, the optical axis spacing between the first and second lenses is T12, the optical axis spacing between the second and third lenses is T23, the optical axis spacing between the third and fourth lenses is T34, the optical axis thickness of the first lens is CT1, the optical axis thickness of the second lens is CT2, the maximum distance between the optically effective area of ​​the object-side surface of the first lens and the optical axis is Y11, and the maximum image height of the imaging lens system is ImgH. It satisfies the following conditions: 0 < f1 / f2 < 2.0; 1.6 < T12 / (CT1+CT2); 1.1 < T23 / T34 < 5.0; and 1.2 < Y11 / ImgH < 2.

0.

2. The imaging lens system assembly as described in claim 1, characterized in that, The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following conditions: 0.20 < f1 / f2 < 1.

7.

3. The imaging lens system assembly as described in claim 1, characterized in that, The distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, which satisfies the following condition: 1.3 < T23 / T34 < 4.

0.

4. The imaging lens system assembly as described in claim 1, characterized in that, The maximum refractive index of all lenses in this imaging lens system is Nmax, the focal length of the second lens is f2, and the thickness of the second lens on the optical axis is CT2, which satisfies the following conditions: 1.80 < Nmax < 2.10; and -30 < f2 / CT2 < -6.

5.

5. The imaging lens system assembly as described in claim 1, characterized in that, The distance between the third lens and the fourth lens on the optical axis is T34, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the focal length of the imaging lens system assembly is f, and the focal length of the third lens is f3, which satisfies the following conditions: 3.0 < (CT3+CT4) / T34 < 18; and |f / f3| < 0.

25.

6. The imaging lens system assembly as described in claim 1, characterized in that, The distance between the first lens and the second lens on the optical axis is T12, and the thickness of the first lens on the optical axis is CT1, which satisfies the following conditions: 3.6 < T12 / CT1 < 6.

0.

7. The imaging lens system assembly as described in claim 1, characterized in that, The object-side surface of the first lens is convex near the optical axis; the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9, satisfying the following conditions: 1.0 < R1 / R2 < 10; and -1.6 < R8 / R9 < -0.

60.

8. The imaging lens system assembly as described in claim 1, characterized in that, At least two of the first to sixth lenses each have at least one surface containing at least one inflection point; the distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL; the entrance pupil diameter of the image lens system assembly is EPD, which satisfies the following conditions: 11.0 < TL / EPD < 22.

0.

9. An image capturing device, characterized in that, Include: The image lens system assembly as described in claim 1; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens system assembly.

10. An image lens system assembly, characterized in that, It contains six lenses, which are arranged in the following order from the object side to the image side of the optical path: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; The first lens has negative refractive power, and its image-side surface is concave near the optical axis. The second lens has negative refractive power, and its image-side surface is concave near the optical axis. The fourth lens has positive refractive power; and The object-side surface of the sixth lens is concave near the optical axis; Wherein, at least one of the first to sixth lenses has at least one surface containing at least one inflection point; The imaging lens system comprises six lenses in total. The first lens has a focal length of f1, the second lens has a focal length of f2, the optical axis spacing between the first and second lenses is T12, the optical axis spacing between the second and third lenses is T23, the optical axis spacing between the third and fourth lenses is T34, the optical axis thickness of the first lens is CT1, the optical axis thickness of the second lens is CT2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the aperture of the imaging lens system is Fno, the focal length of the fourth lens is f4, and the combined focal length of the fifth and sixth lenses is f56. This system satisfies the following conditions: 0 < f1 / f2 < 2.0; 1.9 < T12 / (CT1+CT2); 0.65 < T23 / T34 < 5.0; 2.0 < (V4+V5) / (V3+V6) < 4.5; 0.30 < f56 / f4 < 2.0; and 1.2 < Fno < 2.

0.

11. The imaging lens system assembly as described in claim 10, characterized in that, The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following conditions: 0.20 < f1 / f2 < 1.

7.

12. The imaging lens system assembly as described in claim 10, characterized in that, The distance between the first lens and the second lens on the optical axis is T12, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, satisfying the following conditions: 2.1 < T12 / (CT1+CT2) < 3.

0.

13. The imaging lens system assembly as described in claim 10, characterized in that, The minimum refractive index of all lenses in this imaging lens system is Nmin, the sum of the distances between any two adjacent lenses on the optical axis is ΣAT, the sum of the thicknesses of all lenses on the optical axis is ΣCT, and half of the maximum field of view in this imaging lens system is HFOV, which satisfies the following conditions: 1.60 < Nmin < 1.70; 1.1 < ΣCT / ΣAT < 3.0; and 60.0 degrees < HFOV < 110.0 degrees.

14. The imaging lens system assembly as described in claim 10, characterized in that, The fourth lens has a focal length of f4, and the combined focal length of the fifth and sixth lenses is f56, satisfying the following conditions: 0.37 < f56 / f4 < 1.

7.

15. The imaging lens system assembly as described in claim 10, characterized in that, The thickness of the first lens along the optical axis is CT1, the thickness of the second lens along the optical axis is CT2, the thickness of the third lens along the optical axis is CT3, the thickness of the fourth lens along the optical axis is CT4, the thickness of the fifth lens along the optical axis is CT5, and the thickness of the sixth lens along the optical axis is CT6, satisfying the following condition: 14.0 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 27.

0.

16. The imaging lens system assembly as described in claim 10, characterized in that, The distance along the optical axis from the object-side surface of the first lens to an imaging plane is TL, and the maximum image height of the image lens system assembly is ImgH, which satisfies the following conditions: 4.0 < TL / ImgH < 7.

0.

17. The imaging lens system assembly as described in claim 10, characterized in that, The fifth lens has positive refractive power; the optical axis spacing between the fourth and fifth lenses is T45, and the optical axis spacing between the fifth and sixth lenses is T56, satisfying the following conditions: 1.5 < T45 / T56.

18. The imaging lens system assembly as described in claim 10, characterized in that, The fifth lens has a convex surface near the optical axis on its image-side surface; the radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, satisfying the following conditions: 0.80 < R10 / R11 < 1.

4.

19. The imaging lens system assembly as described in claim 10, characterized in that, At least one of the first to sixth lenses is made of glass, and both its object-side and image-side surfaces are aspherical; the radius of curvature of the image-side surface of the second lens is R4, and the thickness of the second lens along the optical axis is CT2, satisfying the following conditions: 4.5 < R4 / CT2 < 25.

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